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4.3 Programming Cable
The programming cable is used to connect the programming port of the RCM4510W to a
PC serial COM port. The programming cable converts the RS-232 voltage levels used by
the PC serial port to the CMOS voltage levels used by the Rabbit 4000.
When the PROG connector on the programming cable is connected to the RCM4510W
programming port, programs can be downloaded and debugged over the serial interface.
The DIAG connector of the programming cable may be used on header J2 of the
RCM4510W with the RCM4510W operating in the Run Mode. This allows the program-
ming port to be used as a regular serial port.
4.3.1 Changing Between Program Mode and Run Mode
The RCM4510W is automatically in Program Mode when the PROG connector on the
programming cable is attached, and is automatically in Run Mode when no programming
cable is attached. When the Rabbit 4000 is reset, the operating mode is determined by the
status of the SMODE pins. When the programming cable’s PROG connector is attached,
the SMODE pins are pulled high, placing the Rabbit 4000 in the Program Mode. When the
programming cable’s PROG connector is not attached, the SMODE pins are pulled low,
causing the Rabbit 4000 to operate in the Run Mode.
RESET RCM4510W when changing mode:
Press RESET button (if using Prototyping Board), OR
Cycle power off/on
after removing or attaching programming cable.
3-pin
power connector
Programming
Cable
J1
U1
RESET
Colored
edge
R3
C40
C8
C5
C46
R19
L1
C41
U11
C6
C2
C1
RCM1
C27
/RST_OUT
/IOWR
VBAT
EXT
PA1
J2
GND
/I ORD
/ RST_IN
PA0
PA2
+5 V
GND
+3.3 V
UX47
BT1
UX49
1
UX4
S1
RESET
RX81
C16
C9
U3
R20
C18
R14
C4
JP16
JP6
JP5
JP12
JP4
JP3
JP14
JP8
C16 JP7
JP18
JP9
JP10
JP1
PA3
PA5
PA7
PB1
PB3
PB5
PA4
PA6
PB0
PB2
PB4
PB6
RX83
RX11
UX30
C15 C23 C1
C20
U1 C21
C42 C22
Q8
Q1
C5
U17
C35
R25
C34
JP2
JP3
JP4
PB7
PC1
PC3
PC0
PC2
PC4
UX10
JP5
PC5
PC6
C44
RX43
C82
R65
C84
R29
R20
R10
R61
JP6
JP7
JP9
JP8
PC7
PE1
PE3
R19
PE5
R9
PE7
PD1
LN1
PE0
PE2
PE4
PE6
PD0
LN0
PD2
LN2
RX67
UX12
PD3
LN3
PD4
LN4
UX14
DS3
R22
RX97
RX49
RX55
RX57
RX59
R33
R31
R30
R35
R32
PD5
LN5
PD7
LN7
VREF
PD6
LN6
CVT
AGND
RX75
CX25
DS2
JP25
RX73
R23
CX27
CX23 RX77
R21
R24
RX79
UX16
UX3
R52
J3
1
1
GND
R51
S2
S3
GND
GND
Figure 9. Switching Between Program Mode and Run Mode
User ’s Manual
37
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